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  • 型 号 :

    CX1342

  • 待机功耗 :

    ＜30mW

  • 工作模式 :

    SSR

  • 控制方式 :

    External drive GaN 500KHz

  • 应 用 :

    Full voltage ≤ 100W power adapter, PD

  • 封 装 :

    SOP-9
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Summary:

CX1342 is a highly integrated quasi resonant flyback controller chip suitable for designing high-performance offline flyback switching power supplies, with an internal integrated high-voltage starting circuit; It can reduce the no-load power consumption to less than 30mW.

CX1342 has comprehensive protection functions, such as OPP (Overpower Protection), OVP (Overvoltage Protection), OSCP (Output Short Circuit Protection), AC network power failure protection, and primary abnormal overcurrent fault protection, which can prevent circuit damage in various abnormal situations and improve the safety of the CX1342 controller.

CX1342 has a frequency jitter function, which can effectively improve electromagnetic interference. When in light load, it limits the minimum operating frequency and enters the skip cycle operating mode, which can avoid audio noise during light load. The chip adopts SOP-9 packaging, which saves PCB space and is the preferred solution for low-power, low-cost, and high-efficiency projects.

Characteristic:

  • Abnormal overcurrent fault protection for winding short circuit or saturation detection

  • Bottom switch, bottom locked, no noise working mode

  • Built-in high-voltage starting circuit and power failure detection

  • Integrated X2 capacitor discharge function within the high-voltage start pin

  • Built-in 4 millisecond soft start time

  • The maximum switching frequency can be adjusted, up to 500KHz

  • With OTP fault detection pin

  • VCC working range from 9V to 28V

  • VCC over 28V triggers overvoltage protection

  • The minimum frequency clamp is a frequency turnback mode of 25 kHz, improving light load efficiency

  • Light load skip cycle mode without audio noise

  • MPCM mode for quickly reducing switch frequency under light load

  • Adjustable Overpower Protection (OPP)

  • Internal integrated over temperature protection

  • No load power consumption less than 30mW

  • Dithering function can reduce EMI

  • SOP-9 encapsulation

Application:

  • AC-DC adapter and charger

  • flyback switch power supply


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